Bow-spring.



'No. 755,124. PATENTBD MAR. 22, 19014.

' 1. FOX.

BOW SPRING.

N0 MODEL.

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' UNITED STATES Patented March 22, 1904.

PATENT OFFICE.

IVAN FQX, on LANSDOWNE, PENNSYLVANIA.

BOWQSPRINGI SPECIFICATION f ming part Of Letters Patent No. 755,124, dated March 22, 1904.

Application filed July 7, 1903. Serial No. 164,532. (No medal.)

. To all whom/it may concern:

Be it known that I, IVAN Fox, a citizen of the United States, residing at Lansdowne, in the county of Delaware, State of Pennsylvania, have invented certain new and useful Improvements in Bow-Springs, of which the following is a specification.

This invention relates to an improvement in bow springs of the construction illustrated in my Patent No. 730,450, dated June 9, 1903, and consists of means whereby the opposite end portions of a spring constructed in acshowing my invention; Figure 4 is an inverted plan view of the same.

Referring to Figures 1 and 2 of the drawings,

a designates the central portion ofa bow spring which is tubular; and b designates portions of the bow spring upon opposite sides of the said portion a, the said portion bbeing semi-tubular, that is to say, of arcuate shape in cross section.

Referring to Figures 3 and 4, it will be noted that the main or body portion 0 of the bow spring is semi-tubular or of arcuate shape throughout substantially its entire length.

As thus far described, the constructions shown in Figures 1 to 4 is the same as that shown in my Patent No. 30,450, dated June 9, 1903. It has been found, however, that when the end portions of the bow springs are flat as disclosed in the said patent, the springs are weakened at their points of connection with the posts or standards of an eye glass frame. In order to overcome this defect, I have bent or curved the end portions d of the bow spring transversely in a direction the reverse of that in which the main or body portions of the bow springs are bent or curved; that is, the ends 01 of the bow springs are bent or curved; that is, the end portions d of the 5 bow springs illustrated in Figures 1 to 4 are curved outwardly while the main or body portions of the bow spring illustrated in said figures may besaid to be curved or bent inwardly.

The invention consists in and comprises a bow spring having a body portion which is crooked in cross section, and end portions which are also crooked in cross section.

It will be understood that the said body and end portions of the bow spring may be bent so that the cross sections thereof will disclose different contours or conformations without departing from the spirit of my invention. I, therefore, do not confine myself to the specific details of construction shown, except as hereinafter limited in the claims.

I do not claim herein broadly a bow spring having opposite ends which are crooked in transverse section, such a claim being made in my co-pending application filed September fourth, Serial No. 171,858.

Having thus described my invention, I

claim- 1. A bow spring for eye glasses comprising a body portion which is crooked in cross section, and end portions'which are crooked in cross section.

2. A bow spring for eye glasses embodying a body portion which is concavo convex in cross-section and end portions which are concavo-convex in cross section.

3. A bow spring for eye glasses, the edges of the main or body portion of which are bent in one direction, and the edges of the opposite ends of which are bent in the opposite direction.

4. A bow spring for eye glasses comprising a semi-tubular body portion and semi-tubular end portions, substantially as described.

5. A bow spring for eye glasses comprising a semi-tubular body portion, and semi-tubular end portions, the curvature of the end portions being the reverse of that of the body portion, substantially as described.

6. A bow spring for eye glasses comprising a body portion which consists of a tubular portion and semi-tubular portions upon opposite sides of the tubular portion, and semi-tubular end portions, the curvature of the latter being the reverse of that of the semi-tubular portions of the body, substantially as described.

7. A bow spring for eye glasses, the edges of the main or body portion of which are bent inwardly, and the edges of the end portions of which are bent outwardly, substantially as described.

8. A bow spring for eye glasses comprising a 'tubular'portion, portions of arcuate shape in transverse section upon opposite sides of said tubular portion, and end portions of arcuate shape in transverse section, the curvature of the two arc-shaped portions beingin opposite directions, substantially as described.

9. A bow spring for eye glasses, comprising a tubular portion, and end portions, the edges of which are out of the planes of the central portions of said ends, substantially as described.

10. A bow spring for eye glasses, comprising a tubular portion, and end portions, the edges of which are deflected outwardly from the central portions thereof, substantially as described.

11. A bow spring for eye glasses comprising a tubular portion and end portions which are crooked in cross section.

12. A bow spring for eye glasses comprising a body portion which is curvilinear in cross section and end portions which are curvilinear in cross section.

13. A bow spring for eye glasses consisting of a thin metallic strip bent transversely and longitudinally, the central portion of said how spring being formed into a tube, and the portions thereof upon opposite sides respectively of said tube being curved transversely to form portions of arcuate shape in transverse section, and portions at the opposite ends of said spring the edges of which are bent transversely in directions opposite to that which the remaining portion of the springis bent, substantially as described.

In testimony that I claim the foregoing as my invention I have hereunto signed my name this 2d day of July, A. D. 1903.

IVAN FOX.

In presence of THOS. K. LANCASTER, CYRUS N. ANDERSON. 

